Radiant fins

"The merfolk have always been leery of all creatures that hail from land. However it may not always have been that way. In the age of the albino dragonoids they seemed to have been far more common and prevalent near the western coast. However, there was an empress by the name of Samas who slaughtered them for their fins, which were colorful in water, but when taken out of the water to be turned into clothing, it would turn into an unpleasant pale white color."